Edge roll forming and sewing machine



. inventor JAMA'S ARNOLD CASH C(ttmmeg 8 Sheet S-Sheet 1 JAMES ARADLDCASH JR- .J A CASH ET AL EDGE ROLL FORMING AND SEWING, MACHINE Sept. 9,l9 52 Filed Nqv. 17, 1947 Sept. 9', 1952- Filed Nov. 1'7, 1947 v J. A.CASH ETAL EDGE ROLL. FORMING AND SEWING MACHINE 8 SheetsSheet 2 SnventorJAAa-s ARNOLD CASH JAMES ARNOLD CASH an.

attorney Sept. 9 ,-1952 J. A. CASH ETAL EDGE ROLL FORMING AND SEWINGMACHINE Filed Nov, 17. 1947 8 Sheets-Sheet 5 Snventor g JAMES ARNOLDCASH AND JAMES ARNOLD CASH JR.

' (lttorneg Sept. 9, 1952 J. A. CASH ET AL EDGE ROLL. FORMING AND SEWINGMACHINE 8Sheets-Sheet 4 Filed Nov. 17. 1947 Enventor JAMES ARNOLD CASHJAMES ARNOLD CASH 11R (Ittomeg Sept. 9, 1952 J. A. CASH ET AL 72,609,768

EDGE ROLL FORMING AND SEWING MACHINE Filed Nov. 17. 1947 8 Sheets-Sheets nun ozmm 0:

MOVEMENT CONTINUED naw/w MOVEMENT /.50"

NOAMAL PLANE or earn/0N or CAM PLATE Snnentor JAME ARNOLD 045;! JAMESARNOLD CASH J2- (Ittomeg Sept. 9, 1952 J. A. CASH ETAL EDGE ROLL FORMING"AND SEWING MACHINE 8 Sheets-Sheet 6 Filed Nov. 17, 1947 INVENTOR. JAM"Mvow c4511 mvn JAMzs ARNOLD c4551 11:. BY

ATTORNEY 8 Sheets- Sheet 7 J. A. CASH ETAL EDGE ROLL FORMING AND SEWINGMACHINE Sept. 9, 1952 Filed Nov. 17 1947 I 7 INVENTOR. JAMES ARNOLD CASHAND JAMES ALA OLD C4511 J2.

ATTORNEY Sept. 9, 1952 J. A. CASH ETAL EDGE ROLL FORMING AND sswmc;MACHINE 8 Sheets-Sheet 8 Filed NOV. 17. 1947 INVENTOR.

ms mow c4551 Aw /AMA! AIM/OLD any in.

ATTORNEY Patented Sept. 9 1952 UNITED STATES PATENT OFFICE:

EDGE ROLL SEWIN James A. Cash, Louisville, and James A; Cash,- J r-.,Jefferson flounty, Ky., assignors to-J'ames Gash Machine-'00:,Louisville, Kyr, aicorporatio-n of Kentucky RPHQM N m 17, 94 Sexis No!7853 55!" 331:0,laims;

This invention relates to sewing machinesyand relates in particular tomachines-tor forming an edge roll on a mattress or the"like-and'for seivingthe roll on-the mattress;

Stuffed mattresses consist of an outep cgvera ing or tickingfi-l'ledwi-tlr loosefibrousmaterial, such as cotton fibers, or the like,and it-is-u'sual togather the ticking and filling materi'al into' a rollalong the edgesand'sew therollalong the base topreservethe-shapeof themattress.- The present invention relates to amachine forautomaticallygathering the-ticking and filling-' material into aroll at the edge andsewing-the-roll, although it willbe understood that the invention may beemployed for: operating on other articles in a similar manner.

It is an obj ect-of the present invention to provide a combination rollformer and stitcherwhich maybeoperatedat a faster ratethan heretofore.

A further object is the provision of acombination roll former, andstitcher-of simplified construction; whereby the costo-f'manufacture isreduced.

A further object is the provisionof a combination rollformer andstitcher-which'is positively guided tomaintain a substantiallytangential relation in traveling around acurve.

Another object is the provision of animproved roll forming movementwhich is or simplified oon l struction.

In accordance with the present invention, there is provided acarriage-for-roll former and sti'tcher mechanisms; which carriage canbee-operated to continuously advance along the article to be operated onfor successive rollforming' and sewing operations, and on whicht-hesewing needleand rolllformcr are mounted to be moved .retrogradelyrelative theretowhile they are in contact with they article, and to beperiodically advanced to overtake and assume'their starting position inthe, carriage for the next successive operation. This arrangement andconstruction avoids the repetitive starting and stopping ofthe,carriage, as heretofore done in prior constructions, and enablesthe rateofsewing tobe increased, partly because the periods of carriageacceleration and deceleration present; in the start-and stop mechanismsof prior constructions are eliminated.

Furthermore, this arrangement enables the simplification of themechanism. for exampleby mounting the sewing needle and roll former onesingle vibrating, mount, these elements may be moved retrogradely inunison,and thus only one retrograde actuating mechanism can serve-toactuate both elements. Eur-then simplification of 'themechanism isobtained-s by: mounti-ngthe needlefor reotilinear sewmg move...

ment on the vibrating -mou=nt and actuating thez 5 also ma-ybeuniversally connected by motion transmitting links to a mot-ion-varyingcami The-advancing and-retrograde vibration ef' the mount for-theneedleandrolliormermay be complished in any suitable manner. We prefertoemploy for this purpose a cam which is bodilv continuously advanced"with the. carriage anon-1s.

rotated in synchronism with the advancing move-M men-"t; the camproviding-a surface inclinedlf-rom the normal. This cam surfaceprovides-a gradua ally advancing 'zone anda steep retrograde zone toalternately-move the mount backward and fora ward respectively. afollower which en gages the camand operates "the vibratingmount carryingth sewing and roll forming mocha will move retrogr-adely when contactwith the advancing zone of-"thecam; and' wtil'l advance rapidly when incontact with a the steep the sewing needle during the retrograde phaseor the'oscillation when there is no relative movement between thearticle acted on andthe I'OHfQllIliDg;

or" sewing mechanisms; By providing a quick-v advancing or overtaking Amovement, more than half the time'between successive stitches car-i bedevoted to the roll forming and s-ewingoperationsr It ispreferred toemploy a gripper mechanism in conjunction with the sewing mechanism orroll" forming -mechanism to prevent the artiele be'ingoperated on frombeing displaced bythe advanc ing movement or the carriage. Thismechanisin is-preferably" in the form of a pair of separable gripperjaws or the like which are timedto-g'rip the article and moveretrogradely *duringf-the period of overtaking movement of the mount';and which are released and advanced a t any suitable time thereafter inreadiness for the next grippingoperation. The back and iorth vibrationof the gripper, which is out oPphase-withthe vibration of themount, canbeobtained-"by a follower engaging the cam in ma agemention to thefollower for thev-ibrating-mount; and

the gripping and releasing action of the grippers may be timed by asuitable cam surface and follower on the same cam member. If desired,the sewing mechanism may be employed without the roll forming mechanismor any suitable roll forming mechanism may be employed therewith.

The invention further contemplates the provision of an improved andsimplified roll forming mechanism which is'readily secured to the mount.

This mechanism preferably comprises a pivoted linkage having a rollforming element, such as a packing needle, the mechanism havingprovision for advancing the roll forming element by a substantiallylineal movement into the article and for changing the angular relationof the links to turn the roll forming element in the article with areprovided to cooperate with the cam track toshift the respective pivotsof the roll former movement.

. The carriage and mechanism are advanced by a motor which is suitablyconnected to rotate the cam member in synchronism with the advancingmovement of the mechanism. The carriage is advanced by the engagement ofa gear on a rack, and the guiding structure for the carriage includes atriangular roller or shoe arrangement engaging parallel guide surfacesalong the edge to be sewed and to which the rack may be secured. Inturning a corner one of the rollers or shoes acts as a pivot, and therack is curved about said pivot as a center. The other two rollers,which may be designated as base rollers, are the base of the triangle.The turning radius of the base rollers is the distance between centersof the pivot roller and one of the base rollers, and in turning a cornerthe base becomes a chord of the turning are at the corner, the corner ofthe outer guide surface being cut oil to provide turning clearance. Byhaving the sewing needle and roll former aligned parallel to saidtriangle base, the tangential or normal relation thereof to the radiusof curvature is preserved in going around corners.

;The invention also includes provision for supporting a mattress to beoperated on, with means for raising or lowering the support toaccommodate different thicknesses of mattresses, and provision forchanging the sewing angle at the edge of the mattress.

g The invention embodies various other features,

all of which will be described in greater detail in connection withtheaccompanying drawing, wherein is shown preferred embodiments of theinvention by way of example, and wherein:

- Figure 1 is a perspective view of the entire invention,

Figure 2 is a fragmentaryside view showing the advancing and guidingarrangement, 7

Figure 3 is a view similar to Figure 2 with additional parts removed,

Figure l is a view of the traveling carriage as seen from the right inFigure 1, and with parts of the housing broken away,

Figure 5 is a detail of the guiding roller as seen from the right inFigure 2,

Figure 6 is an enlarged view of the upper por--- tion of the carriage asseen in Figure 4 with the cowl removed to show the interior,

Figure 7 is a side view of Figure 6 as viewed from the left and showingthe parts in corresponding position,

Figure 8v is a side view similar to Figure 7 with the shuttle brokenaway and the parts in an advanced position,

Figure 9 is a view of Figure 8 asseen from the right and including theshuttle,

Figure 10 is an enlarged side view of a fragment as seen in Figure l,and showing the cowl and roll shaper,

.Figure 11 is a partly diagrammatic view of the cam member as seen inFigure 7,

Figure 12 is a diagrammatic end view of the cam showing how the advanceand retrograde movement is produced,

Figure 13 is a perspective view of the bobbin housing,

Figure 14 is an enlarged view of the packing needle and shank,

Figure 15 is a diagrammatic view illustrating the operation of the guidein turning a corner,

Figure 16 is a perspective view of the roll shaper bar,

Figure 17 is a perspective view of the vibrating mounting bar strippedof attachments,

Figure 18 is a side view of the vibrating mounting bar carrying the rollforming movement.

Figure 19 is a side view of the gripper arm as viewed in Figure '7,

Figure 20 is a fragmentary view of certain details of the gripper barasviewed from the opposite side of Figure 19,

Figure 21 is a side View showing the mounting of the carriage head onthe carriage,

Figure 22 is a sectional view taken on line 22-22 of Figure 21, andshowing the cam plate in section,

Figure 23 is a side view of a modified roll former, a cam therefor beingdiagrammatically shown,

Figure 24 is a side view of a further modification of the roll former.

Figure 25 is a view of a part of Figure 24 showing the roll former in anadvanced phase of movement,

Figure 26 is a view similar to Figure 25 showing the roll former in afurther advanced phase, and

Figure 27 is a diagrammatic view of the cam operation for themodification of Figure 24.

Work elevating adjustment Referring to the drawing, Figure 1, there isshown a table or platform I adapted to receive a mattress to bestitched, and having angle brackets 2 depending therefrom which havethreaded nuts secured to the bottom that receive the threaded posts 3.The lower ends of the posts are suitably rotatably journalled in socket'or hearing members'4 carried by a stationary base or support indicatedgenerally at 5, and sprockets 6 are secured to the posts near thebearings. An endless chain 1 passes over the sprockets 6 and over adrive sprocket (not shown) driven by suitable reduction gearing from areversible electric motor 8, so that upon operation of the motor thethreaded posts 3 are rotated in threaded brackets 2 to raise or lowerthe platform. A suitable manually controlled switch (not shown)is'provided to operate motor 8.

ncomes undersurface of which is secured an endless toothed rack l2. Abracket 1.3 (Fig.4) carried by the traveling carriage 14 has bosses. land. I6 which receive thehexagon head spindles 1.1 and I8, on which arejournalled on suitable ball bearings, the surface contacting means inthe form of spaced rollers 19 and 2 I respectively, adaptedtoengagetheoutside face 22 (Figs. 1 to 3) of the rail H. A slotted arm23 (Figs. '2 -and 5) "adjustablysecured to bracket 13 by'a bolt24'pa'ssed through the slot, carries aspindle 25 which receives asurface contactingmeans in the form ofa roller 26 I also suitablyjournalled on ball bearings. Roller-*2-6 engages the insideeface-fl ofthe rail ll. 7 The engagement of rollers I9, 2 l and ZB-With theopposite: faces of the rail H holds the spur gear 28,which isrotatablyjournalled in the stitcher carriage H, in engagement with the tooth rack12, so that: when the spur gear 28 is rotated the stitcher is caused totravel along the rail li'around theplatform l. The effective length ofarm 23' may beac'curately ad justed by rotation of the setscrews 29whichpass through the cross bar 380i the armand are threaded into holes 3| inthe bracket f3. An arcuate cam 32 (Figs. 1 and 15) is carried at'eachcorner-of therail H, the purpose-of whichwill be later explained.

Arms 33 andfl'34 are swivelled on spindles 35 and 36 between extensions31 and 38 of the bracket l3. The arms rotatably carry at their ends theshanks 39 of clevices '48 that' receive the rotatable grooved casters. Asteadying rail 42' (Figs.'1' to3) in the form of a circular'rod' or'tubeis suitably secured, as by welding, on the upper face of'rail. l I, andthegrooved casters 4| straddle the rail 42. At the bottom the base 5carries a guide rail 43"(Fig.'1')' and a roller 44 journalled on avertical spindle on the carriage, engages the guiderail 43'.Theguiderail 43 is curved at the corners. The casters serve to supportorsuspend the traveling stitcher carriage on the rail H, while the rollersI9, and 26. engaging'jrail H, and roller engaging rail 43;hold thecarriage steady in its travel'around' the rail. Thetubularformof'rail'42'allows the casters to travel around the bends at the.cornerslwithout climbing up upon the rail.

Carriage advancing mechanism A motor 45' (Fig. 4) 'iscarried in the basehousing ofthe stitcher carriage l4, and is connected by a-drive 46comprising a belt and pulleys, to drive the reduction gear box 41;

of a lever54 secured on shaft 5l,.the collar 50. maybe manuallydisengaged from .gear 28, thus allowing gear 28 to: rotate freely on:shaft 48. When gear 28 is rotated by-mo'tor 45,:itsaengagementwith'the'toothed rack 12 causes the stitcher assembly to continuously'travel or advance aroundfthe rail' 'l I. By disengaging collar=fromge'ar- 28; the gear isvfree to rotate: and; the.

Gear 28'is rotatably journalled on-the reduced end of shaft 98, 98', andthe'rollers move in the cam. groove;

stitchernmay-zbe manually lpushednalongfithe rafl' I II to-any desired'ilocation;and r upomre eiigagement of clutchtcollar '58, the geanis-locked to themotor to be driven thereby. 'The motor'li isi controlled*by: a 6 suitable i manually operated switch: 55" secured: to the. sideoil the-assembly; which preferably is of the: type normally biased toopen position, and closed by manualoperation. If desired, 1 any othersuitable means may be providedvtc' advance: the stitcher assembly:

The traveling carriage l4 carries an edgeroll' forming mechanism and asewing mechanism which vibrate laterally at a suitable frequency andspeed so as to enable thewhole carriage to continue to advancelduringthe' time ei'ther the sewing needle, or roll forming'mechanismjor bothare in contact with the mattress to besewed. The 'roll forming mechanismwill first be -described.

Roll forming mechanism A vibrating guide or mounting bar56 (Figs. 6,1?-and i8) ispivoted by-a pivot. 51 to an internalboss 58 in the carriagehead 59, and. at its opposite end carries the roll forming movementindicated generally at 6|]. This movement comprisesan actuating link 6|anda bowedpivot shifting link 62 pivoted to'the mount ab'aCOmmon pivot63. A bowed clinch operating 64 and a presserfinger link 65 of aboutequal length are. pivotally secured toactuating link-6i, and may beconnected together at a common pivot 66. A. roll former element intheformof a gathering point or needle 61 has a shank portion 68 (Fig. 14)by which it is'pivoted at. 69 tolink 62, and the end of theshankportionis.

pivoted at H to thebowed clinch operating" link 64. A pair of flat bars12 are suitably clamped inspaced relation to mount. bar 56 to provide avguide-slot for. the operation of bowed links62 and 64. The distance.between. pivot points 69 and H in the shank 68 oftheroll forming point.

preferablyis slightly less than the. distance :between the pivot points63 and 66in the actuating; linkfil. Links 62 and 64 maybe ofequal lengthbetween their respective pivots 63, 69and. 68,, H.

Aroll forming element in theform ofa bellcrank roll presser finger I4carried by the mounting; bar 56, is pivoted thereto at 15, and the end.is pivoted at 16 tolink-GS. In the positionshown: in Figure'l the rollforming packing needletl and presserflnger 14 are inispread positionand:

are .out of engagementvwith the mattressedge:

which passes through. the C-shaped mouth 1.8 in themount bar 56.

arm Which is pivoted at to a boss on the carriage head. Asimilaradjustable connecting rod 86 is similarly swivelled by auniversal swivel at 81 to'the end of actuating link 6|,and at'i88 to acam follower-arm 89, which.is alsopivotally connected at 85 to thecarriage head. 6 Follower arms 84, 89 carry rollers 9| and 82respectively (shown schematically in Figure 11) on stems 93 111 the faceof motion varying cam plate 94'.

Camplate 94 is suitably journalled for rota tion in the casing andcarries a spur gear 95 (Figstfi and-8). A pinionlnotshowny on. spindle96 and in' meshw-ith gear "95- carriesa sprocket 91 which is driven by achain- 98 passingover the sprocket and over a driving sprocket surmise4) operated byithe power input shaft extending into reduction gear box41. The cam groove 93 has'a circular or dwell section 9311. (Fig. 11) ofsmaller'radius, and a circular or dwell section 93b of-larger radius,which sections are each about 90 in extent, respectively, and are joinedby a connecting groove portion 930 of about 45 in extent, and a spiralconnecting retracting portion 93d of about 135 in extent. The portion930 preferably is concave to reduce vibration in the cam followers.

Operation of roll former The cam plate 9:3 rotates in the direction ofthe arrows shown in Figures 7, 8 and 11. Referring toFigure 8, thepacking operation has been completed and the packing needle 61 is readyto-withdraw from the mattress. When rollers ill and 92 (Fig. 11) enterthe spiral withdrawing portion 93d of the cam, which is the portionextending from the small radius part 9311 to the large radius part 9311,follower arms 84 and 89 move (Figs. '7 and 8) in unison graduallyradially outward from the cam center (or to the *left) about their pivot85, and through connection links 8|, 8'5, actuate the packing needlecontrol links GI, 62, 64 to draw the packing needle 61 away from'themattress in a substantially lineal or echelon movement about the pivot63. The packing needle remains in withdrawn position while rollers 9| 92are both on the dwell portion 93b of. larger radius of the cam. Whenadvance roller 9I enters on the concave portion 930 of the cam, camfollower arm 84 (Fig. 7) swings on its pivot toward the center of thecam, (or to the right) and through connecting rod 8'I swings driver link62 about its pivot 63, thereby increasing the distance between pivots 6Band 69 and causing link 68 and its needle 67 to' rotate clockwise aboutpivot II and assume the position shown in Figure 7 ready for ascendingmovement. Continued rotation of the cam causesroller 92 to entertheconnecting portion 530 of the cam, so that links 6| and 62 turn togetherupwardly about their pivot 83 to cause the packing needle 61 to ascendin a substantially straight line motion into the mat tressf .When roller9! practically reaches the dwell portion 93a of smaller radius on thecam, further forward movement of pivot point 69 is arrested and astrailing roller'92 enters portion 930 of the cam, it pivots link 54 tomove pivot point 'II and thus causes counterclockwise rotation of needleE'I about pivot 69 in a prying or clinching movement to pack thematerial into the corner roll of the mattress. At the same time movementof link 65 closes packing finger I4 externally over the packing needleto substantially the position shown in Figure 8, so as to compress thematerial at the base of the roll. The roll is maintained compressedwhile rollers SI, 92 are on the dwell portion 93a of small radius of thecam. 'The next movement is the withdrawing movement as above described,to repeat the cycle of operations. 7 i

It will be understood that the designation of links 62 and 64 as pivotshifting and clinch op,- erating links respectively, is relative, as theroll forming mechanism maybe modified so that link 8 becomes the driveror pivot shifting link, the pivot 69 being suitably mounted to beshifted for the clinching movement- Also, in place of the roll formingmovement described, any other suitable roll forming movement may be'employed.'-

Roll shaper" Asseen in Figure 10, the front cowl or hood I02 provides aslot I03 which is received in the mouth 18 of the mounting bar 56, and aconcave bar I04 (Figs. 10 and 16) is located at the base of the slot andis adjustably held therein by a set screw I05 extending through theslotted end flange I05 thereof into the cowl. The edge roll formed bythe packer point 51 and finger It abuts bar I04, which serves to smooththe roll. The bar I 04 can be adjusted toward or from the bottom of' theslot upon releasing screw I05, and can be clamped in adjusted position.The adjustment of bar I04 also providesfor regulating the thickness ofthe formed roll therein by the packing needle, the degree of vcompression of the material in the'roll being determined by the depth towhich the mattress corner initially is manually fed into the slot orgroove I03.

Sewing needle movement The mounting bar 56 has two extensions I08 and I09 (the latter forming the lower jaw of mouth 18) which carry betweenthem a guide rod III, and a needle block II2 has a bore II3 therein toreceive said guide rod. A track or channel bar IM (Figs. 6 and 9) alsois carried by the bar 56, and a roller I I5 suitably journalled on aspindle IIG carried by the block, moves in the track or channel of barII4. Rotation of the block IIZ about guide rod I II as it reciprocatesthus is prevented. Block II2 carries a long grooved sewing needle II'Ihaving an eye at its point, and when the block moves upward along itsguides the needle passes through aligned guide bores H8 and H9 (Figs. 9and 1'7) in the jaws I09, I2I of mouth 78.

Needle block II2 has a link I22 universally pivoted thereto at I23, andthe opposite end of the link is universally pivoted at I24 to one endo'f'pitman I25. The other end of the pitman is universally swivelled atI26 on a suitable boss in the casing. A crank pin I21 (Figs. '7 and 11)in cam plate 94 has one end of connecting rod I28 journalled thereon,and the other end of the connecting rod is pivoted at I 29 by auniversal pivot to the pitman. The crankpin I2! is located on the camplate at a predetermined angular relation to the cam track 93. Thus,rotation of the cam plate causes the crank pin and connecting rod tooscillate the pitman I25, which in turn reciprocates the needle blockII2 on its guides and causes the needle alternately to penetrate thebase of the mattress roll located in the cowl slot Hi3 and to bewithdrawntherefrom. The thread loop in the needle eye is picked up andinterlocked with the bobbin thread and the needle movement issynchronized with the action of the roll forming mechanism, all as willhereinafter appear. 1

Needle angle adjustment The carriage base I4 has an extension I30 (Figs.21 and 22) suitably bolted thereto'by bolts.

through into a threadedbore I31 in the extension holds the head inadjusted position. By releasing handscrew I36 the head may be rotated inboss I3I to the desired angular position.

The shuttle shaft .and has a thread finger I41 extending I therefrom andhas a hook or retainer I48 located in a suitable cut away part of theshuttle. The bobbin thread I49 (Figs. 6 and 9) iromthe bobbin I'5I isstrung, through a hole in the bobbin shelland through a suitable springfriction drag on the shell I46 (not shown) and through holes I 52 andI53 in the finger. A convex head thumb screw I54 holds the bobbin in theshell I46. A hollow needle guard I55 swivelled on the upper jaw I2I isengaged by finger I41 to keep the finger in proper position, and alsoserves .to prevent finger I41 from getting into the path of the needle.

I Thread tension A thread tensioning arm I56 is pivoted intermediate itsends by a pivot I51 passing through extension boss I58 on pitman I21,and its one end is pivoted at I59 to an end of arm IEO. Arm I60 is heldat the other end by universal pivot 85. The thread I6I for the needlepasses from the supply ball in side cup I62 (Fig. 4) through a frictiondrag I63 (Fig, of suitable construction and then through a guide I64 andthrough an eye I65 in the cowl or hood I02, and then through an eye I66in the end of the tensionin arm, then through an eye I61 in the needleblock I I2 and thence to the needle eye. Each time the needle movesdownward the tensioning arm I56 moving therewith draws the stitch tautand near its final downward movement draws additional thread through thefriction drag I63 from the supply ball in readiness. for the next upwardmovement of the needle. 0n the upward movement of the needle the tensionarm moves along upward with the pitman to provide the slack thread forthe loop at the eye of the needle.

The looping operation After the needle H1 and its thread I6I has passedthrough the base of the mattress roll, the looped thread in the eye ofthe needle is picked up by the looping hook I45, and as the hook iscarried around by the shuttle, the loop is first caught on retainer I48.Continued rotary movement of the shuttle and looper hook I45 twists theneedle thread I6I over the bobbin thread I49. The shuttle is rotated atdoublethe speed of cam 94, so that the needle and tension arm is onlyhalf retracted by the time looper hook I45 reaches inverted position,shown by dot and dash lines in Figure 6, and the retraction of thetension arm I56 pulls the loopoff the looper finger I 45 and draws theloop tight over the bobbin thread which extends fromfinger I41. Movementof the tension arm beyond the needle} block eye draws enough thread fromthe supply hall to provide thread for the next stitch. The e ee f t ut ad o per bei sknown in the art, further explanation of the loopingoperation is not deemed necessary. It is to be understood thatanydesired type of shuttle or stitch forming mechanism may be employedin place of that illustrated.- I

Synchronization of sewing and roll forming operations Referring toFigure 11, wherein the operating cam is diagrammatically shown, thecrank Din I21 connected to pitman I25. causes the needle to complete onesewin cycle for each rotation of the cam, and thelocationof cam rollers91-,

92 on their follower arms is such that theroll, forming operation iscompleted at or before the;

sewing needle enters the base of theroll. The

crank pin preferably is located near; the'end of; the retracting portion93d of the cam, so that. retraction of the roll forming mechanism beins.

before the sewing needle ,starts to withdraw from the mattress.(counting from about the time the packing. needle contacts the mattressuntil it is com.-

pletely: withdrawn from the mattress roll) plus I the sewing operation,(counting from ,the. time; the needle enters the mattress to aboutthetime it is completely withdrawn therefrom) occupies about 300 of the camcycle. During the re maining 60, more or less'of the cam cycle, the rollforming and sewing needle are completing theirrespectivecycles ofoperationin readines for the next successive operation.

As the stitcher carriage is beingmoved for:

ward at all times by the engagement of rotating gear 28 with rack I2, itis apparent that during; about 800 of the cam movement, covering that;

period during which either or boththe packing needle and sewing-needleare in contact withthe mattress, these needles must bemovedretro gradelyrelative to theadvancing stitcher; carriage at thesame speed as theforward motion of the stitcher carriage. Or otherwise stated; thepacking needle and sewing needle. remain .-in-

aflfixed location in contact with the mattress While the stitchercarriage moves forward, andafter .contact of the needles with themattress ceases, the needles areadvancedin 60? of the cam rotation (moreor less) to catch up with or overtake the stitcher carriage, whereuponthey. again are movedretrogradelyasabove described The mechanism for.vibrating the roll forming and sewin movements in this manner now willbe described. I I I Lateral vibi dtingniechanism Cam plate 94 has aperipheral warped groove or track I68, and the lateral extension I69 ofarm 56 carries a roller I1I operating infthe track. A portion of the camtrack I68 is sharply warped at I68a out of the normal planeof rota--tion for an axial distance correspondingio slightly less than the lengthof astitch, and has a gradually sloping or retrograde section designatedat I681 The gradually sloping section. which corresponds to theretrograde 'phasefis about 300 of the; periphery, while the sharplywarped section corresponding to the overtaking or advancing phase isabout 60. These sections may be varied as desired in the design of theapparatus. As the cami-plate rotates,

the roller I1I operating in. the track I68 later-' The roll formingoperation,-

asoorzestz while the sewing-or" packing needles are "in-con tact-with"them'attress; roller I1 I is in the retrograde s'ection I 68bof-the-camtrack, and-whenthe sewin'g' Y needle leaves the mattressand isb'ein-gpulled-taut" by the tension arm. I56 while.

the' needlei'i's moving downwardly, which .occurs dUrliigithetime1th'emountbar'56' is in the overtaking'phas'e .of its ;movement. Theovertaking movement of bar'r56 thus '1 exerts a forward pullonfthemattress through the'thread, and a gripperji-s .providedito holdthe mattress stationary against thisp'ull; In the preferred embodimentthe'tgripperis:carriedby the "carriage and oscillates in'displacedphase'relativeto .the bar 56. 'I'hegripping "mechanism willnow bedescribed.

Thagrippenmecham'sm.

Agripperjarm; I15--is pivoted to the carriage hea'd 'at I16iiioverhanging; relation to the .cam plate 94, and a--roller-I1'1'(Figs.' 11 and 19) depends therefrom into the cam track'yltll, wherebythe-"'gripper- -arm is oscillated laterally forward' andb'ackward-by thecam; Thejarm I15 isflisp'osd atsubstantially arightangle to "mountarnrfifi} and-the roller I11 is 'angularly'displacedfrom the roller 11!;which governs-the oscillationof theisewing and rollformingmechanismsy'by aboutthesame angle, namely 90".. Thus-L-during"the'whol'e-time that'roller I1.I is in the 'advancing sectionI68aof' the cam andv is'moving arm-'56 'inits advancing or catchingup-phase, the gripper'arm-I 15 is;moving retrogradelyr due to theengagement "of its roller I 11 ii'f-theretrograde portion -I68b of thecamtrack'. The gripping-action-on-the mattress occurs duringi theretrograde action-ofiarm' I15 and is timed to include the period of"advancing move ment'ofb'arili; as will nowbe explained.

Gi-ipp'erarm-l15-at-its outer end carries a stub'shaft I18 (Figs-:19 and20) journalled there in to which is suitably secured, as by a splitclamping portion-,-the lower curvednjaw I19. At its one end stub shaftI18 carries a gear segment-I 81 Aasecondparallel stub shaft 1 82, alsorotatably journalled inthegripper arm above shaftr-.'I18,acarriesatmeshing. segmental gear I 83 at onexzendiandz at its. other end'issuitably secured ithe -upperr-cin'vedgripper jaw I8 1. Thebitingg-iedgesztof.jaws-I19; I841r'nay be scalloped orrserrated toimprove'their: gripping action.

, Camw-plateefl 'has" a shoulder which-provides aircami-tsurfa'ce; I 85'(Figz'll) comprising-a cylindricali: portion "1 85m and a projectedcylindrical portion I851) joined thereto by connecting portionstfl5crand I85d of?any suitable-shape; .A portioxr ofathe cam plate' maybe relieved at I86 to save-material;- and the cam: track 85is' warpedaround: thezreli'eved portion whil naintaining itsn-clcyli'ndricalsurface; A jaw a tuating arm I81;."suitably clamped'to stubshaft I18,carries a roller l88 'at its 'endfand a'helical tension spring I89,stretchedbetween a pin I 9I on arm, I15 amtra hole -192iin-actuating armI81,'ho1ds the roller- 1 88: in engagement :with iitheicamislIl'fzm.e.-:=

When roller I88; is 1 in engagementzwithdwell; portion I a.. of the..oam.;the spring 189i acting;

through arm I81 andgear segments I 8| and I83 maintains the jaws inclosed or clamped position on the mattress roll; When roller I 8.8enters upon=-the forward 'portion- -lfic of the-camreib.

tension, the jaw-actuating-arm I81 is.--.rotated clockwise-with stubshaft I18 as its pivot. and

by means of meshing gear" segments I 8 I,'..I83

causes both jaws I19, I84 to open-and-release their hold on the-mattress: The laws remain. in open position until the roller I88passes-over v thedwell portion I85b; and start to close when the rollerenters the connectingportion a I 85d: of the cam, and arenaintainedclosed while the.

roll'er'tr-aver'ses the dwell portion: I 8500f: the cam.- The portion:I85b 'of" the cam is=ab0ut:60 fin;

extent-and is timedto engage roller I88: during the advancing portion 0fthe cycle or operation: of"gripper-'- arm :I15 and acts on roller I88dur-jing' the timethe sewing needle is in engagementwith the -mattress;and while themount .bar 56 ismoving retrogradely.

Comer. turnin ppemtion Referringito :Eigures: 1:.Lto; 5 ;and". 15,.itwil1=be:

around theborner. .Advance base roller I 9 there fore. ,commenceshtodescribe a circle at the point I fabout the apex. roller as. its.center, as shown by the dot and dash circ1e,gand the outside corner,ofithe .rail is cutaway at thepoint where the base roller commences .its.arcuate movement. This cut.v away portion. 32"preferably is, formed asa' curve. about the apex roller. .as: the center *and' meets thestraightportionof the rail at I95xiand I96 soras to'providetan engagingsurface'for roller I9, althoughthe surface'32 'may'be angular; ifdesired." Trailing rolleryitat thesame time also commenoes'todescribea-circle on the same radius and leavesthetracktsurface 22- until"its course brings it-topoint I95 Where it: engages; curved surface'32;

When'rroller' I 9, reaches: thepoint I 35' it leaves the railsu'rface-ZZin its arcuate path. Although in describing thexturneither-or bothrollers I9, 2| may leave the track surface22lor curved surface 32, thecarriage is 'heldsteady by the engagement of'gear '28on rackiILas' itadvances thecarriage around." the corner. .iWhen. trailing 'roller. 2|reaches thepoint-IBG, the pivot roller gives up its pivotposition-andadvances along rail. II at right anglesto' its approachpath.The base line 12 between the Lcenters of rollers I9, 2| is a chord ofth'e'turning circle; and. the altitude of the triangle is"designated'at-a; The radius of curvature of surface '32 islonger'thanthe distance to between-outersurface "22*"and. the. center of apexroller '26.

' The altitude "line a lies on a radiusof theturning circle and bytiming the sewing needle move-.-

If the sewing needle is located to penetrate at the base of the altitudelined, or between the base and the apex, the stitch spacing at thecorners will be slightly shorter than on the straightaway. By locatingthe needle to penetrate on the external extension of line a, thestitches may be made the same length or longer than on the straightaway.The imaginary line between the sewing needle and the packing needle inmouth 18 may make any suitable angle to the radius line r. However, byhaving this imaginary line perpendicular to radius line 1', a tangentialrelationship to the stitch circle will be maintained in going around thecorners. Such a relationship generally is desirable. I

Operation of complete apparatus The operation of the entire apparatusnow will be described. A'mattress to be stitched isplaced upon the tableI which is raised or lowered as required by suitable operation of motor8 to bring the upper edge thereof on a level with the slot .I 03 in thecowl I92. The mattress then is positioned by the operator with its edgeparallel or coincident to the edge of the table and engaging rollshaping bar N14. The thickness of the roll may be-adjusted by adjustingthe depth of roll shaping bar I04 in the slot I03 and clamping it inadjusted position by screw I05. The carriage head 59 may be turned asdesired inthe boss I3I to adjust the angle at which the needle entersthe side of the mattress, and is locked in adjusted position bytightening the clamping screw I36. Because all the pivot mounts 51, 85,I26 and III? are on the casing, rotation of head 59 does not affect thephase relation of the various cam followers relative to each other. Thatis, rotation of head 59 shifts all parts cooperating with the cam inunison. A sufiicient length of the bobbin and needle threads I49, IBI aredrawn out and held by the operator, and the apparatus is ready to beginoperation.

- Beginning with the apparatus in the position shown in Figures 6 and'7, the sewing needle II! is shown retracted, and the packing needle 61has been turned in readiness, for upward movement. Movement of concavecam portion 930 (Fig. 11) under rollers 9|, 92 pivots links 62, 64counterclockwise about pivot 53 and advances the packing needle 6'! intothe side of the mattress in a substantially straight line movement;Then, coincident with the clinching movement of packing needle 61,thepresser finger l4 movesinward to ward the mattress and holds the rollin position against the roll shaper bar I04. The sewing needle nowpenetrates the base of the roll while the rollers BI, 92 on the dwellportion 23a of the cam hold the packing needle and .presser fingerstationary. During this phase of the operation the whole mounting bar 56carrying the roll forming and sewing elements, is moving retrogradely,and the gripper jaws I19, I84 have engaged the mattress roll in theposition shown in Fig. 9. The looper hook I45 catches the loop in theeye of the needle and moves around to inverted position, shown in dotand dash lines in Fig. 6. The packing needle withdraws from the roll inan arcuate parallelmovement,.andby providing a relatively longwithdrawing period for the packing needle, deviation from a straightline movement while the needle is in the roll is not of consequence.Then the sewing needle is retracted and the retracting tension arm I56pulls the loop off of the looper hook I45. The mounting bar 56 nowquickly completes its overtaking or advance movement while the gripperjaws continue to hold the mattress edge and continue their retrogrademovement as shown in Figure 6.

The continued downward movement of "ten-- sion arm I56 pulls taut theneedle thread, which has been 'twistedover the bobbin thread, and as theeye I66 thereof passes the eye I61 in the needle block in itsdownwardmovement, additional thread is drawn from the supply ball forthe "next stitch. When the packing needle reaches the position shown inFigure 18 the rollers 9|, 92 on cam 94 turn the needle to the positionshown in Figure 7 ready for the next ascending movement, while thegrippers are still movingretrogradely but are near-the end of theirretrograde movement. When thepacking needle enters the mattress edge atan advanced position, the grippers release the mattress roll and make aquick advance movement to the position shown in Figure 9 ready forretrograde move ment, and the rollforming and sewing cycle as abovedescribed is repeated. When the carriage rounds a corner of the mattressabout the center of apex roller 26, the sewing needle is alwayssubstantially on a radius, and the line between the sewing needle androll packing needle is tangential to the stitch circle or are; Becauseit is not necessary to start and stop the whole sewing and roll formingmechanism each time a stitchis made or a sectionof roll is made, theoperation of sewing is greatly accelerated. In addition, byfoperating ortiming the mechanisms from a: single source, which is the cam plate 93,the mechanism is greatly simplified.

Modifications In Figure 23, is illustrated a modified form of rollformer, which is particularly adapted for use on mattresses employing alight weight ticking. The modified oscillating mount .bar 2!", whichreplaces mount bar 56 in the carriage, carries a pair of bell crankpresserfingers 202 and 203 pivoted at 204 and 205 to the jaw mem-- bers206 and 201 thereof. These fingers en gage the side and top of amattress along the edge in the roll forming operation. An actuat ing arm208 (corresponding toarm 6|) is pivoted at Zll S at one end to anextension 2 I I. of the mount bar, and a pair of connecting links ZIZand 2I3, corresponding.respectively to links 65 and 64, extend from acommon pivot. 2I4 at an intermediate part of arm 208v and are pivotallyconnected at 2I5 and M5 to the ends of presser fingers 2G2 and 203respectively. In the sewing operation, the needle passes through alignedholes in jaw members 206,.201.

A cam track ZI'I replaces the track 93 and has a dwell portion 2H1) oflarge radius, and finger opening and closing portions H and 2nd,, Aroller 2IB is, carried on a. suitable single cam followerwhich isconnected by. a link 2I9 to the end of actuating arm 2ll8by a universalconnection. The cam, follower and connecting link are diagrammaticallyillustrated in Figure ,23, and the center of rotation of the cam track'ZI'I is diagrammatically indicated by the crossed dot. anddash lines.The needle block and guide therefor carried by mount bar ZOI areconstructed andoperated substantially as shown in Figures 7 and 18. iWhe 4 the cam roller 2H} is on the dwell part 2 I lb of the car'n track,therollis being held com pressed by'the fingerslflz, 203in"-the"position shown in Fig. 23, while the sewing-needle enters theroll, has its thread loop picked up by the e tates.

002921121 1ihfillflithQIhWS rnmtherdl. -When the'cam roller is on theportion21f1dofthecam, heeact atinsarm; .9 2 bein swun cl kw at. t'.incl-p v t:12 9.1, hus. withdr w n h pres erifineersrzflzia d 1 v frm..;t e o -W e t e.camrro l r218- s the ort on ,1 1; wheit a lsheractuati -a m 2.081s swun cou er clockwiseabout itspivot 209, thusrotating finger 2fl2 clock ise andfinger 203 counterclqckwise about,their respective pivots 204, nd :2 1t9: r0 1 om ress n p s ion. vInthis modification, the presser; fingers, which constiutez hecrc formin mnt e e a o r inchine m tion. n y nd ret a f m r..ba e.-t rcuehv u t n il y the semen)- tary ath f movement that they-take in form- 1...:e2mcnt.f course hat thedi ec-v ent is reversed. If desired, the caimgnayhavepadwell portion of suitable extentgbetween portions 21 1d and 2 1 1cthereof n fi urese Q- 'Z themo fie m un b r 220 has-a bloclg;.2 21extendingfcrwardly between the .;extenSi9ns; -;109,5l2 1 constitutingthe mouth 1B,:a-nd; a; guide. rod 222 is suitably mounted therein. Ayoke member 223 has a sleeve 224 whic 'sslidable, on the guide rod sothat the M capable, of: reciprocation thereon. The legs-; 2 2 5,; 2200fthe yoke have the-roll forming elements-. -202, 203 pivotedthereon at221 and 228 respectively,; and connecting links 212, 213 are pivetallyconnected at their ends thereto at 215 and-. -210;. An extension 229 onthe yoke carries a. --;hell; crank 'lever -230 pivoted thereon at 23",and the links 212, 213 are pivotally joined together at 232 on one armof the bell crank. Rotation of the bell crank 230 about its pivot 231thusoppositely rotates, the bell crank presser fingers-2.202, 203 in theroll forming operation. Ashaft, 235 .journalled in the housing carriesa. cam, follower 236;diagrammatically shown in Figure,,,27, whichcooperates with a suitably sha e cam 23'lthattimes theoscillationthereof, .anda crank. arm, 238-- (Figs. 24 and 27) is carriedby this fshaft. A rod 239 suitably adjustable in lengthconnects arm 238withbell crank, 230- Rod;239 i s secured by universal connections tocranks 238 and 230 so as to allow yoke 223 to oscillate with mount bar220., The roller 112 carriedon asuitable extension 2400f the. mountbaroperates .in a suitable trackto guide the mountbar in its advancingand retro: gradeoscillation. V

A shaft 241 suitably" journalled in the housing carries a cam follower242 diagrammatically shown in Figure, 27 which cooperates with. a secondcam 243 that timestheoscillation thereof. A block 244 with trunnionsonitsend is carried by shaft 241, and; an arm 245 hasa yoke 246 atone endjournalled on the trunnions.

The =opposite end of arm 244 has a slot. 241 which receives the pin 248securedin sleeve 224. Oscillation of shaft 241 .upon its axis thuscauses-the yoke 223. to. reciprocate upon guide rod 222, carrying withit the bell crank 230, the slot and pin connection 241, 248 allowing forthe, angular differential movement. between-arm 245 and pin- 248.The-pivotal connection-of yoke 2.46,.0nthe. bl0ck .244-allows the arm245 130 oscillate with mount bar 220 in its' retrograde and overtakingmovements, and the universal connections of rod 239 with cranks 238',230 also permits such oscillation without substantiallydisplacing-crank; 230: The sewing -needle;may operatedrin any suitable.mann r: e; pe ation ;:th; s m dificat ns. as ol.-

l ws:v Ther.-mount;-.bar 21 0- arry ngth ..-:a v described; roll formerelements and the vrecipreg eatingsewing needle is oscillated with aretro-v grade and overtaking movement, like mount arm 50. The timingcams 237; 243shavesuitably shaped. portions to oscillate shafts 235, and.241 forv effecting movement of the roll forming ele ments- As shownin-Figure 24,:the yoke 223 is ready to move intoroll forming position,and the corresponding cam positions and follower arrangements thereforare diagrammatically shown in Fig. 27. Follower 236, is on the dwellportion 23?! of larger radius of cam 23'! and follower 242 isonthedwellportion 24312 of larger radius of cam 243. When follower 242enters connecting portion 2 430 of th y cam it turns shaft 241 clockwiseand through arm 245' moves the yoke 223 downward along, guide; rod222;tothe position shown in Figure 25. Because ,oftheuni-z versalball andsocket joint connection of rod 239 with-cranks 230 and 230, and because.rod 239 joinscrank 238' close to pivot shaft 241, movement ofthe yokeoccurs without substantialrotation of hell crank 200; The rollformingfingers 202; 203 thus are-moved in a-substantiallyrectilinearpath into engagement with the mattress. Follower 242. nowenters on dwell portion 243m of smaller radius of the'cam243, to holdthe yoke in this position.

Now, follower 236 comes off of dwell portion 23121 of larger radius ofcam'231 onto connecting portion 2371c andjthus turns shaft 235-counterclockwise, which in turn through rod 239:turns bell crank 230 clockwise.This moves the common pivot 232 of links 212,213, downward to theposition shown in Figure 26, thus'rotating the fingers 202, 203 abouttheirpivots221, 228 to form and compress a roll'at the edge of themattress. The fingers, 202, 203 are held in this position whilefollowers 242 and 236 engage the cam'dwell portions 243a and 231arespectively of smaller radius.

After the sewing needle enters the base of the roll and is withdrawn,for example, as explained in connection with the'previously describedmodifications, the'followers 236, 242 simultaneously have' reached theconnecting portions 231d and 243d respectively,and simultaneously turnthe shafts-235- clockwise and 241 counter clockwise. This. causes arm245 to raise yoke member 223 at thesame time that arm 239 rotates crank230 to move common pivot 232 and cause roll; former elements 202, 203 tobe reversely rotatedin the withdrawing movement to clear the compressededge'roll. That is, the pivot points: 221, 228* of the roll formerelements are being moved at the same time that the elements 202, 203 arebeing rotated about these pivot points. Thus in the retracting movementthe ends of the roll forming elements describe a cycloid path whichmoves them clear of the compressed roll in one continuous movement.

It will,be observed that in this modification theroll former-fingers202, 203 have only three movements, namely, 'a rectilinear movementwhich brings them into engagement with the mattress, a rotary orclinching movementwhich gathers and compresses thematerial ofthemattress into? r011, andga, cycloidal releasing or retractingmovement. By reducing the .7 roll forming movement to three suchmotions, the construction and operation is greatly simplified. Ifdesired, one or both of the presser fingers-202; 203 in thismodificationmay be replaced by pack- 1 1 ne d es-l Theytimingcams forshafts 235 241 have suitable dwell portions so as to determine theduration of the various movements or phases of the roll former. Duringthe contact of the roll former or needle with the mattress the mount bar220 is moving retrogradely, and th retraction of the roll former occursat a suitable period in the overtaking movement of the mount bar.

Although the roll forming movements herein described are employed inconnection with an oscillatable mount for retrograde and overtakingmovement, it is to be understood that they may be employed, if desired,in the conventional starting and stopping carriage mechanism. of theprior art, with corresponding benefits. Various other modifications maybe made without departing from the spirit or scope of the invention.

Having described our invention, we claim:

1. In an apparatus of the character described, the combination of sewingmeans intermittently engaging an article to pass a needle into saidarticle; a supporting carriage for said sewing means; means forcontinuously advancing said carriage; means providing relative movementbetween said carriage and sewing means to allow said sewing means toremain substantially stationary in contact with said article while saidsupport is advancing, and means for periodically advancing said sewingmeans relative to said carriage while out of engagement with saidarticle for successive operations on said article.

2. In an apparatus of the character described, the combination of: asewing mechanism; a supporting carriage therefor; means for continuouslyadvancing said carriage for successive operations on said article; andmeans providing vibrating movement between said carriage and sewingmechanism to allow said mechanism to remain substantially stationary incontact with said article, while said support is advancing and toperiodically advance said mechanism while out of engagement with saidarticle.

i 3. An apparatus as specified in claim 2 having a looper mechanismmovable with said carriage, and wherein said sewing mechanism includes aneedle having a sewing movement transverse to the path of movement ofthe carriage.

4. In an apparatus of the character described, the combination of: asupporting carriage; a sewing mechanism pivoted on said carriage forintermittently engaging an article to pass a needle therethrough; meansfor continuously advancing said carriage for successive operations onsaid article, and means providing synchronized vibrating movement ofsaid sewing mechanism on said carriage to allow said sewing needle toremain stationary in contact with said article while said support isadvancing.

5. In an apparatus of the character described, the combination of a rollforming mechanism; a sewing mechanism; a carriage therefor; a stationarysupport for said carriage; means for advancing the carriage along thesupport for successive operations on an article; and means providingvibrating movement between said carriage and mechanisms to allow saidmechanisms to remain substantially stationary in contact with saidarticle while said support is advancing and to periodically advance saidmechanismswhile out of engagement with said article. i

6. An apparatus as specified in claim 5 wherein the advancing movementof said mechanisms is less than half of the operating cycle.

'7. In an apparatus of the character described, the combination of asewing mechanism; a car riage for said mechanism; means for continuouslyadvancing said carriage; means for vibrating said mechanism to maintainit in stationary relation in contact with an article being sewed whilesaid carriage is advancing; means for gripping said article during thetime said sewing mechanism moves out of engagement with said. article inthe direction of movement of said carriage; and means for moving saidgripping means retrogradely during the gripping operation.

8. An apparatus as specified in claim '7 wherein said carriage carries aroll forming mechanism vibrated in unison with said sewing mechanism.

9. In an apparatus of the character described, the combination of: aroll forming mechanism intermittently engaging an article to form. aroll thereon; a carriage for said mechanism; means for continuouslyadvancing said carriage; means providing relative movement between saidcarriage and roll forming mechanism to allow said roll forming mechanismto remain substantially stationary in contact with said article whilesaid carriage is advancing; and means for periodically releasing andadvancing said roll forming mechanism for successive operations on saidarticle.

10. In an apparatus of the character described: a movablecarriage; arail providing a pair of spaced guiding surfaces having angularlydisposed portions; a cylindrical guide track carried by the rail alongits length; a pair of swivelled grooved casters carried by said carriageand operating on the track to support the car riage on the rail; contactmembers carried by the carriage comprising a pivot member engaging oneof said surfaces and a pair of base contact members engaging the otherof said surfaces; a cut away surface portion joining the angularlydisposed portions at the points of departure of the base member from theguide surface in rounding the corner whereby said carriage can turn thecorner at said angularly disposed portions about the pivot member as thecenter. 11. A roll forming mechanism for a mattress comprising a pair ofroll forming elements, adapted to engage the mattress, at least one ofsaid elements being a blunt finger; means pivotally supporting saidelements; means for moving said pivotal support to bring said elementsinto engagement with a mattress; means for oppositely turning saidelements in their moved position to form a roll; and means forsimultaneously withdrawing and reversely turning said blunt finger outof engagement with said roll in a cycloid path; and means forsimultaneously withdrawing said other element.

12. A roll forming mechanism comprising a pair of links pivoted on acommon fixed pivot a roll forming point pivoted to the end of one ofsaid links, means to oscillate the one link, and a connecting linkpivoted at one end to the other link and at the other end to the rollforming point.

13. An apparatus as specified in claim 12 having means connected to eachlink of said pair of links for independently moving said links aboutsaid common pivot.

14. An apparatus as specified in claim 1.2 having a presser fingerlocated to cooperate with said roll forming point, and a link connectind presser finger to one of said pair of links.

15. A roll forming mechanism comprising a pair of links pivoted on acommon fixed pivot; a roll forming point pivoted to one of said links; aconnecting link pivoted to the other link and to the roll forming pointwhereby the roll forming point is carried by said links; a presserfinger pivotally mounted to cooperate with said roll 19 forming point;and a link pivoted to the presser finger and to said connecting link.

'16. An apparatus as specified in claim 12 having a carriage; a mountingbar carried thereby vibrating movement, and in which said fixed commonpivot is carried on said mounting bar.

17. In an apparatus or" the character described; a carriage; means foradvancing said carriage; a mounting bar on said carriage; a roll formingmechanism carried on said bar; a sewing needle carried on said bar,means for actuating said sewing needle and roll forming mechanism; andmeans for vibrating said bar with a retrograde and overtaking motion.

18. An apparatus as specified in claim 17 in which said actuating meansincludes motion varying means mounted on said carriage, and motiontransmitting links universally connected to said roll forming mechanismand sewing needle.

19. An apparatus'as specified in claim 17 in N which said actuatingmeans comprises a cam member having a cam surface for actuating the rollforming mechanism and a crank for operat ing said needle.

20. An apparatus as specified in claim 17 where- .in said bar vibratingmeans comprises a warped cam surface on said cam member and said bar hasa follower engaging said warped cam surface.

21. An apparatus as specified in claim 17 in which said actuating meanscomprises reciproeating means for said needle; means mounted on said barfor guiding a needle for reciprocating movement; a crank member; andmotion transmitting links between said crank and needle including auniversally pivotal connection.

22. An apparatus as specified in claim 17 having article gripping meansvibrated in displaced phase relative to said bar, and means foractuating said gripping means.

23. A clamping assembly comprising a pivoted arm: a pair of clampingelements pivoted on said arm, means connecting said elements for opposedpivotal movement, an actuating arm connected to one of said elements,cam means engaging saidlatter arm to pivotally operate said clampingelements, and means to oscillate said first arm.

24. In an apparatus of the character described: a carriage; a cam memberjournalled for rotation on said carriage; a mount bar pivoted to saidcarriage and engaging said cam to be actuated thereby; a sewing needlemounted on said bar; means on said cam for operating said sewing needle;a roll former on said bar; means on said cam for operating said rollformer; a gripper member mounted on said carriage; means on said cam foractuating said gripper member; and means on said cam for vibrating saidgripper member out of phase with said bar.

25. An apparatus as specified in claim 24 having a head pivotallymounted on said carriage, and wherein said bar, and gripper member aremounted on said head.

26. In an apparatus of the character described; a sewing head; a mountbaron said head carrying a needle reciprocating mechanism; a rotaryshuttle carried by said head; a bobbin casing in said shuttle having afinger extending therefrom; means forvibrating said mount bar and aguard for said needle on the mount bar engaged by said finger.

27. An apparatus as described in claim 25 wherein said finger carriesthe thread from the bobbin.

28. In an apparatus of the c aracter described; a'movable carriage;guiding means therefor providinga pair of spaced guiding surfaces havingmember at the corner, on the pivot member as the center of turning.

29. A roll forming and stitching mechanism comprising: a support for anarticle upon which a roll is to be formed and stitched; a carriagearranged for movement along said support in 0pcrative relationship to anarticle thereon; drive means for moving said carriage substantiallycontinuously; a roll forming mechanism for repeatedly engaging andreleasing said article and operative, during successive engagements, toform successive portions of said article into a roll; a sewing mechanismfor repeatedly engaging and releasing said articlewhen it isrespectively engaged and released by said roll forming mechanism andoperative, during successive engagements, to stitch successive portionsof said roll as it is formed; a head carrying said forming and sewinmechanisms; means mounting said head on said carriage for forward andrearward movement relative to the direction of movement of said.carriage; and means for moving said head rearwardly relative to thecarriage as the carriage moves forward during the engagement period ofsaid forming and sewing mechanisms and'for moving said head forwardrelative to the carriage as the carriage moves forward during thereleasin period of said mechanisms.

30. The mechanism of claim 29 wherein: said head is pivotally mounted onsaid carriage for swinging movement forwardly and rearwardly relativelyto said carriage.

31.'A sewing mechanism including means to move a needle carrying athread through an article to be sewed; a supporting carriage for saidsewin mechanism; means for continuously advancing said carriage; andmeans vibrating said needle moving means back and forth along the pathof advance of said carriage in synchronism with the in-and-outmovementof the needle to allow said carriage to advance while the needle is incontact with the article to be sewed.

32. A roll forming mechanism comprising: a pair of cooperating rollforming blunt fingers pivotally mounted upon a support member; meansguiding said support member for rectilinear movement toward and awayfrom the article to be formed; means to advance said support member;means pivotally connected to said fingers for oppositely turning saidfingers adjacent the advance limit of movement of said support memberinto engagement with the article to be formed; and means forsimultaneously retracting said support member and said latter means atdifferent speeds to reversely turn and withdraw said fingers out ofengagement with said article.

33. A roll forming mechanism comprising: a support having an openingtherein for receiving the edge of a mattress; a link mounted on a fixedpivot on said support; a roll forming element pivotally mounted at oneend of said link; a second roll forming element mounted on a fixed pivoton said support adjacent said opening; a pair of links pivotallyconnected together at a common pivot at one end and pivotally connectedto said r011 forming elements at the other re- UNITED STATES PATENTSspective ende of sa1d pair of linl s; and mova b1e Number Name Datemiaans cam'mg sald for tummg Re. 16,555 Collett -1 "Feb. 22, 1927 Baldfingers- 542,289 Stephenson July 9, 1895 JAMES A, CASH 5 1,300,139 Dr011Apr. 8, 1919 JAMES CASH, JR 1,481,994 Droll Jan. 29, 1924 1,519,299Droll Dec. 16, 1924 1,520,317 Stoneback et a1. 1 Dec. 23, 1924REFERENCES CITED 1,591,115 Dubick July 6, 1926 The following referencesare of record in the 10 1,943,280 Arnold Jan. 16, 1934 file of thispatent: 2,1 ,251 Goldberg Jan. 2, 1940 2,446,150 Wood July 27, 1948

